Results. Functional acuity contrast sensitivity remained very similar in the age groups of 40-49 years and 50-59 years. However, statistically, it significantly decreased at night time with glare (3 cycle/degree) spatial frequencies (p=0.001).

Conlusion. The facts are that contrast sensitivity remained very similar in the age groups of 40-49 years and 50-59 years.

Functional acuity contrast assesment in young and in middle age healthy persons at the night time